EP3087820B1 - Harvesting device and rake for a harvesting device - Google Patents

Description

The invention relates to a harvesting device of the type specified in the preamble of claim 1 and a rake for a harvesting device of the type specified in the preamble of claim 16.

From the DE 10 2007 002 625 A1 a harvesting device is known which has two rakes which are pivoted back and forth towards and away from one another during operation. A first intermediate space, which extends in the area of the rake carrier and the drive element, and a second intermediate space, which extends in the area of the fingers of the rake, are formed between the two rakes of the harvesting device.

It has been shown that branches can get between the two rakes during operation and can be pinched. This can damage the branches and / or the harvester.

In the EP 2 138 028 A2 a component is arranged in the area between the data carriers, which largely fills the area between the data carriers. This results in a comparatively massive appearance and an increased weight of the harvesting device. With such an arrangement, with a large pivoting angle, a gap can arise between the component and the rack, in which branches can be clamped, which can block further movement of the rack.

The invention is based on the object of creating a harvesting device of the generic type which has a simple structure and largely prevents the jamming of branches between the rakes. Another object of the invention is to provide a rake for a harvesting device which largely prevents the jamming of branches.

This object is achieved with respect to the harvesting device by a harvesting device with the features of claim 1. With regard to arithmetic, the object is achieved by an arithmetic with the features of claim 16.

In operation, the rakes pivot between a position pivoted towards one another and a position pivoted away from one another. In the position swiveled towards one another, the rakes are in an inner end position and in the position swiveled away from one another in an outer end position. In order to prevent branches from getting into the first intermediate space, which is at least partially delimited by the rake carriers and the drive element, a locking device is provided which comprises at least one locking element which is moved by a rake and which is parallel to a pivot axis of a rake between the first in the viewing direction Space and the second space protrudes. The locking device separates the first intermediate space and the second intermediate space in each position of the rake from each other in such a way that the intermediate spaces are connected in the viewing direction parallel to a pivot axis of a rake at most via a gap of at most 5 mm. Because the interstices are largely separated from each other in each position of the rakes and are connected to one another at most via a narrow gap of at most 5 mm, no thicker branches can get into the first interstice. The arrangement of the locking element on the rake or a component moved with the rake results in a simple structure. The locking element can be realized with comparatively little material and is therefore light in weight. The locking element arranged on the rake or on a component moved with the rake can be formed independently of the design and spatial arrangement of the drive element. A locking element moved with a rake can also with a large swivel angle of the rake achieve a large separation of the gaps and prevent branches from getting caught even with harvesting equipment with a large swiveling angle of the rakes.

The locking element is held in particular on a rake. The locking element is preferably formed in one piece with the rake. The locking element consists in particular of the same material as the rake, preferably made of plastic. However, it can also be advantageous for the locking element to be held on a computing support. The locking element is in particular formed in one piece with the computing support. The computing carrier can preferably be formed separately from the rake. The rake carrier is preferably made of metal and the rake is made of plastic. In the case of a one-piece design of the locking element with the computing support, the locking element can also be formed in a simple manner from metal and therefore has high stability. However, it can also be provided that the rake carrier and the rake are made in one piece, in particular made of plastic, and the locking element is held on the one-piece component. The rake is the area of the rake with which the rake is mounted and driven. A one-piece component is advantageously provided, which forms the computer carrier, rake and locking element.

The first intermediate space can also extend into the area of the inner fingers of the rake, so that the at least one locking element is arranged in the area of the fingers of the rake. Alternatively, the second intermediate space can also extend into the area between the rack, so that the at least one locking element is arranged in the area of the rack.

It has been shown that a separation of the first and the second intermediate space from one another in a viewing direction parallel to the pivot axis of a rake is sufficient. A complete separation of the gaps is not necessary, since branches are usually aligned approximately in the direction of the pivot axis and thus, for example, cannot overcome blocking elements which are arranged in mutually offset planes, even if they are spaced apart in the direction of the pivot axis. The locking device advantageously completely separates the first intermediate space and the second intermediate space from one another in each position of the rakes in the viewing direction parallel to a pivot axis of a rake. As a result, the entry of thin branches from the second space into the first space is largely avoided. The width of the space advantageously does not decrease from the blocking element to the free ends of the fingers of the rake located on the inside. The width of the space is measured transversely to the longitudinal direction of the internal fingers of the rake and in particular perpendicular to an axis of movement of the drive element. The fact that the width of the space in the direction of the free ends of the fingers does not reduce makes it possible for the branches which are located in the second space to deflect toward the free ends of the inner fingers when the rakes pivot towards one another and cannot be pinched as a result.

It is advantageously provided that the inner sides of the inner fingers of the rake form an angle in the viewing direction parallel to a pivot axis of a rake in the position of the rake pivoted toward one another, which angle is greater than 0 ° and in the direction of the free ends of the inner fingers opens. The angle is advantageously at least 0.5 °, in particular at least 1 °. The angle is advantageously less than 10 °, in particular less than 5 °, in order to avoid too great a distance between the free ends of the two inner fingers of the rakes in the position of the rakes pivoted away from one another. The angle that opens in the direction of the free ends of the inner fingers causes the fingers on branches in the second intermediate space during the pivoting movement towards one another to exert a force in the direction away from the at least one blocking element, that is to say from the second intermediate space in the direction of the Exercise free ends of the fingers and thereby promote branches from the second space. Jamming of branches between the fingers can also be avoided in this way.

A simple structure results if the locking element is designed as a nose. The width of the locking element, which is measured transversely to the longitudinal direction of the associated internal finger, advantageously decreases towards the free end of the fingers. The course of the upper side of the blocking element delimiting the second intermediate space is advantageous steady, especially straight or arched. The top side is particularly advantageously concave. The concave shape of the locking element increases the conveying effect towards the free end of the fingers. This also largely prevents jamming of branches on the blocking element itself. The concave shape of the upper side is particularly advantageous in the case of two locking elements, which are each arranged on one of the rakes. However, a linear or convex course of the upper side can also be advantageous. The locking element advantageously has a rounded tip, to which the top connects.

The locking element is advantageously fixed on a fastening end of the inner finger of the rake on the rake. The fastening end is the area of the finger on which the finger is attached to a holding section of the rake. As a result, the entire length of the internal fingers is largely available as an engagement area in a tree or shrub to be harvested. The distance that the locking element travels during the pivoting movement of the rake is comparatively small. At the same time, branches are prevented from penetrating into the area between the computer racks, that is to say into the first intermediate space.

The blocking element advantageously overlaps the other rakes when the rakes are pivoted toward one another in the viewing direction parallel to a pivot axis of a rake. Due to the overlapping of the blocking element with the other rake, the distance between the rakes is always bridged, in particular without gaps, regardless of the position of the rakes. In each position of the rake there is an extensive, in particular complete separation of the two gaps by the locking device. In the inner end position, the locking elements advantageously fit into the counter contours of the other rake, so that a comparatively wide locking device can be provided and a compact structure nevertheless results. The locking element in the swiveled position is advantageously in a recess in the other rake.

Each rake advantageously has a locking element, and the two locking elements form the locking device. The two rakes are preferably axially symmetrical to the axis of movement of the drive element. The two rakes are advantageously axially symmetrical to a central axis of a guide tube of the harvesting device. The harvesting device accordingly has two rakes which are preferably of identical design and which are only to be mounted in a different rotational position on the assigned rake carriers. This simplifies production and warehousing, as well as the provision of spare parts, even for the user.

Different rakes are usually provided for different applications, which can differ, for example, in the number of fingers and / or the arrangement of the fingers, for example in one plane or in mutually inclined or offset planes. The harvesting device advantageously has a first set of rakes with a left rake and a right rake and a second set of rakes with a left rake and a right rake. The locking devices of the two sets of rakes are preferably designed such that the right rake of the first set of rakes and the left rake of the second set of rakes, as well as the left rake of the first set of rakes and the right rake of the second set of rakes block in the swiveled position. The locking devices form a blocking device. The blocking device is advantageously designed in such a way that pivoting of the rakes into the position pivoted towards one another is blocked. It can also be provided that the blocking device already prevents the assembly of the two rakes not originating from the same set of rakes. This avoids operating the harvesting device with two rakes that are not intended to be combined with one another. For example, it can be avoided that rakes with a significantly different weight, for example due to a different number of fingers, are used with one another. The use of rakes of different weights causes vibrations that can damage the harvester. This can be prevented in a simple manner by the appropriate design of the locking devices. The locking device of the first set of rakes is advantageous in relation to a central plane of one Rake arranged mirror-symmetrically to the locking device of the second set of rakes. As a result, a blocking device can be formed in a simple manner, which block the assembly or pivoting of the rakes into the position pivoted towards one another.

The rake advantageously has a holding section on which all fingers of the rake are held and with which the rake is fixed on the rake carrier. It can be provided that all fingers of the rake lie in one plane. However, it can also be advantageous that the fingers of the rake are arranged in different planes, in particular in mutually inclined planes.

The harvesting device advantageously has a guide tube, at one end of which the rakes are arranged. The movement of the drive element is advantageously transmitted to the rake via at least one articulated lever, the articulated lever being held at a first attachment point on the drive element and at a second attachment point on the rake carrier. The articulated lever advantageously limits the first space. The harvesting device advantageously has a drive motor which is arranged in a housing. The housing in which the drive motor is arranged is advantageously arranged on the end of the guide tube which faces away from the rake. However, it can also be provided that the drive motor is arranged at the end of the guide tube at which the rakes are also arranged.

For a rake for a harvesting device which has an internal finger facing another rake during operation, the rake having a central plane in which a holding section of the rake for fixing the rake lies on a harvesting device, the rake is a locking element has, which extends from one side of his inner finger and has a width which is measured in a viewing direction perpendicular to the central plane perpendicular to an inner side of the inner finger and which is at least 10 mm, in particular at least 20 mm. A width of the blocking element of 10 mm to 30 mm is considered to be particularly advantageous. The width of the locking element is perpendicular to the plane of the inside of the inside finger measured. If two rakes with such a blocking element are arranged on a harvesting device, the first intermediate space and the second intermediate space can be largely separated during operation, even if the outer end position of the rake is a position pivoted very far outwards. Two rakes advantageously form a set of rakes for the harvesting device, and the sum of the widths of all locking elements is at least 20 mm, in particular at least 40 mm. In this case, a locking element with a width of at least 20 mm, in particular at least 40 mm, can be provided or both rakes have locking elements, the total width of which results in at least 20 mm, in particular at least 40 mm. A blocking element with a width of at least 10 mm, in particular at least 20 mm, is advantageously provided on each rake.

The blocking element advantageously has a width which is measured perpendicular to the plane of the inside of the inside finger and a height which is measured in the plane of the inside of the inside finger and approximately in the longitudinal direction of the inside finger. The width of the locking element is advantageously at least half as large as its height. The width of the locking element corresponds in particular to at least the height of the locking element. The width of the locking element is preferably greater than the height of the locking element. The locking element advantageously has a free end facing away from the inner finger. The free end is advantageously at a distance from the central plane of the rake which is less than twice the width of the fastening area, in particular less than 1.5 times the width of the fastening area, preferably less than the width of the fastening area, particularly preferably less than 0.75 times the width of the mounting area. The width of the fastening area is measured perpendicular to the median plane. Due to the small distance between the free end of the blocking element and the central plane, an oblique penetration of branches into the first intermediate space can be largely avoided.

Fig. 1

eine perspektivische Darstellung eines Erntegeräts,

Fig. 2

eine schematische Draufsicht auf das Erntegerät aus Fig. 1,

Fig. 3

eine perspektivische Ansicht des Bereichs der Rechen des Erntegeräts in der aufeinander zu geschwenkten Stellung,

Fig. 4

eine Draufsicht auf den Bereich der Rechen des Erntegeräts aus Fig. 1,

Fig. 5

eine Ansicht in Richtung des Pfeils V in Fig. 4,

Fig. 6

den Ausschnitt VI aus Fig. 5 in vergrößerter Darstellung,

Fig. 7

eine Draufsicht auf den Bereich der Rechen in der voneinander weg geschwenkten Stellung,

Fig. 8

eine ausschnittsweise, vergrößerte Ansicht in Richtung des Pfeils VIII in Fig. 7,

Fig. 9

eine perspektivische Darstellung des Erntegeräts mit einem weiteren Satz von Rechen,

Fig. 10

eine ausschnittsweise perspektivische Darstellung des Bereichs der Rechen aus Fig. 9,

Fig. 11

eine vergrößerte, ausschnittsweise Draufsicht auf den Bereich der Sperreinrichtung der Rechen aus den Figuren 9 und 10,

Fig. 12

eine Darstellung des Bereichs der Rechen des Erntegeräts mit daran montierten Rechen unterschiedlicher Sätze,

Fig. 13

eine vergrößerte, ausschnittsweise Ansicht in Richtung des Pfeils XIII in Fig. 12,

Fig. 14

ein Erntegerät im Bereich der Rechen mit einem weiteren Satz von Rechen,

Fig. 15

eine Ansicht in Richtung des Pfeils XV in Fig. 14,

Fig. 16

eine Seitenansicht in Richtung des Pfeils XVI in Fig. 14,

Fig. 17

einen Schnitt entlang der Linie XVII-XVII in Fig. 14.

Exemplary embodiments of the invention are explained below with reference to the drawing. Show it:

Fig. 1

a perspective view of a harvesting device,

Fig. 2

a schematic plan view of the harvester Fig. 1 ,

Fig. 3

2 shows a perspective view of the area of the rakes of the harvesting device in the position pivoted towards one another,

Fig. 4

a plan view of the area of the rake of the harvesting device Fig. 1 ,

Fig. 5

a view in the direction of arrow V in Fig. 4 ,

Fig. 6

the excerpt VI Fig. 5 in an enlarged view,

Fig. 7

a plan view of the area of the rake in the pivoted away position,

Fig. 8

a partial, enlarged view in the direction of arrow VIII in Fig. 7 ,

Fig. 9

a perspective view of the harvesting device with a further set of rakes,

Fig. 10

a partial perspective view of the area of the rake Fig. 9 ,

Fig. 11

an enlarged, partial plan view of the area of the locking device of the rake from the Figures 9 and 10th ,

Fig. 12

a representation of the area of the rakes of the harvesting device with rakes of different sets mounted thereon,

Fig. 13

an enlarged, partial view in the direction of arrow XIII in Fig. 12 ,

Fig. 14

a harvesting device in the field of rakes with another set of rakes,

Fig. 15

a view in the direction of arrow XV in Fig. 14 ,

Fig. 16

a side view in the direction of arrow XVI in Fig. 14 ,

Fig. 17

a section along the line XVII-XVII in Fig. 14 .

Fig. 1 shows a harvesting device 1, namely a coffee harvester. However, the harvesting device 1 can also be an olive shaker or the like. The harvesting device 1 has a housing 2 on which a guide tube 10 is fixed. A handle 22 with an operating lever 23, namely a gas lever, is provided on the guide tube 10 adjacent to the housing 2. Additional controls on the handle 22 may be appropriate. At the end of the guide tube 10 facing away from the housing 2, a gear housing 11 is arranged. On the gear housing 11, two arms 14 are provided, on each of which a rack 40 is pivotally mounted. A left rake 15 and a right rake 16 are arranged on the rake carriers 40. The left rake 15 has an inside finger 17 facing the right rake 16 and further fingers 19 further away from the right rake 16. The right rake 16 has an inside finger 18 which is adjacent to the inside finger 17 of the left rake 15. The right rake 16 has further fingers 20 which are further away from the left rake 15. In the exemplary embodiment, all the fingers 17, 18, 19, 20 are arranged in one plane.

Fig. 2 shows schematically the drive unit of the rakes 15 and 16. A drive motor 3 of the drive unit is arranged in the housing 2. In the exemplary embodiment, the drive motor 3 is designed as an internal combustion engine, which can be started via a starting device 5, preferably a cable pull starter. The drive motor 3 has a crankshaft 4 which rotates a drive shaft 7 about an axis of rotation 8 via a clutch 6 drives. The rotating drive of the drive shaft 7 is in Fig. 2 schematically indicated by arrow 9. The drive shaft 7 protrudes through the guide tube 10 and forms the input shaft for a gear 12 arranged in the gear housing 11. The housing 2 is arranged at a first end 24 of the guide tube 10 and the gear housing 11 at a second end 25 of the guide tube 10. The gear 12 converts the rotational movement about the axis of rotation 8 into a reciprocating movement in the direction of a movement axis 51. In the exemplary embodiment, the movement axis 51 is coaxial with the axis of rotation 8. However, another arrangement of the movement axis 51 can also be advantageous. At the output of the transmission 12 there is a drive element 43, in the exemplary embodiment a fork head, which is driven back and forth in the direction of the movement axis 51, as is indicated by the double arrow 13.

The rakes 15 and 16 are mounted on the arms 14 with their rake supports 40 so as to be pivotable about pivot axes 41. The pivot axes 41 are perpendicular to the axis of rotation 9 of the drive shaft 7 and to the axis of movement 51 of the drive element 43 and perpendicular to the plane of the rakes 15, 16. The drive element 43 is connected to the rake carriers 40 via articulated levers 21 which are at a distance from the pivot axes 41. Due to the reciprocating movement of the drive element 43, the rake carriers 40 are driven with the rakes 15, 16 to pivot back and forth about the pivot axes 41, as is shown by the arrows 42. The rakes 15 and 16 are pivoted between a position pivoted towards one another and a position pivoted away from one another.

Fig. 3 shows the design of the rakes 15 and 16 and their connection to the racks 40 in detail. In Fig. 3 the rakes 15 and 16 are shown in the position 27 pivoted towards one another. How Fig. 3 shows, each rake 15, 16 has five further fingers 19 and 20 in addition to the inner finger 17 and the inner finger 18. Each rake 15, 16 has a holding section 38 with which it is fixed to the associated rake carrier 40. How Fig. 3 shows, in the exemplary embodiment, guide grooves 47 are provided on the rack supports 40, into the guide strips 48 of the rack 15 and 16 protrude. The connection of the rakes 15 and 16 to the rake carriers 40 is provided such that the rakes are approximately in a longitudinal direction 36 of the fingers 17, 18, 19, 20 ( Fig. 4 ) are held in a form-fitting manner on the computing supports 40. The design with guide groove 47 and guide bar 48 allows the rakes 15 and 16 to be inserted laterally into the rake carrier 40. The rakes 15, 16 are fixed to the rake carriers 40 via fastening elements 44, in the exemplary embodiment via screws screwed into nuts. In the exemplary embodiment, two fastening elements 44 are provided for each rake 15, 16. The pivot axes 41 are formed on the rack 40 and not on the rake 15, 16 itself.

In the in the Figures 3 and 4 In the position 27 of the rakes 15 and 16 which is pivoted toward one another, the drive element 43 is in the position which is moved furthest to the gear housing 11. How Fig. 4 shows, a first intermediate space 29 is formed between the two rake carriers 40, the drive element 43 and the two articulated levers 21. A second space 30 is formed between the inner fingers 17 and 18 of the two rakes 15 and 16. In order to avoid branches or the like from the second intermediate space 30 entering the first intermediate space 29 and jamming there, a locking device 33 is provided which separates the first intermediate space 29 from the second intermediate space 30. The locking device 33 is formed by a first locking element 34 arranged on the left rake 15 and a second locking element 35 arranged on the right rake 16. The locking elements 34 and 35 are arranged adjacent to an attachment end 31 of the fingers 17, 18 on the mutually facing inner sides 26 of the fingers 17 and 18. The fastening end 31 of the fingers 17, 18 19, 20 is the region of the respective fingers 17, 18, 19, 20 at which the finger 17, 18, 19, 20 is connected to the holding section 38. In the exemplary embodiment, the fingers 17, 18, 19, 20 are each formed in one piece with the associated holding section 38.

The first locking element 34 protrudes in the in Fig. 4 The view shown behind the right rake 16, and the second locking element 35 protrudes in front of the first rake 15 in this view. Fig. 4 shows a view in a viewing direction parallel to the pivot axes 41 of the rakes 15 and 16. This viewing direction 50 is in FIG Fig. 5 drawn. How Fig. 4 also shows, a distance is formed in this viewing direction 50 between the inner sides 26 of the inner fingers 17, 18 which corresponds to a width a of the second intermediate space 30. The width a increases in the exemplary embodiment in the direction of a free end 32 of the fingers 17, 18. The width a is measured perpendicular to the axis of movement 51 and transversely to the longitudinal directions 36 of the fingers 17 and 18. The inner sides 26 of the inner fingers 17 and 18 form an angle α with one another which is greater than 0 °. The angle α opens in the direction of the free ends 32 of the fingers 17, 18. The angle α is greater than 0 °, advantageously greater than 0.5 °, in particular greater than 1 °. In order to achieve a small distance between the free ends 32 of the inner fingers 17 and 18, the angle α is advantageously less than 10 °, in particular less than 5 °. Due to the inclination of the inner sides 26 of the inner fingers 17 and 18 to one another, branches or the like, which are located in the second intermediate space 30, when the rakes 15, 16 are moved into the pivoted position 27 in the direction of the free end 32 Fingers 17, 18, ie out of the second space 30 and away from the first space 29. However, it can also be provided that the inner sides 26 of the inner fingers 17, 18 run parallel to one another, so that the width a of the second intermediate space 30 is constant and the angle α is 0 °. The width a of the second space 30 advantageously does not decrease in the direction of the free ends 32 of the fingers 17, 18, so that no forces are exerted on branches between the inner fingers 17 and 18 in the direction of the first space 29 and the branches do not can be pushed towards the first space 20.

How Fig. 4 also shows, the locking elements 34, 35 have a height h which is measured in the plane of the inside 26 of the associated inside finger 17. The height h is measured approximately in the longitudinal direction of the inner finger 17. The blocking element 34, 35 is in each case the area that extends over the in Fig. 4 Dotted extension of the inside 26 of the associated finger 17, 18 protrudes. If the blocking element extends beyond the fastening end 31 of the finger, the height h is measured in the plane in which the inside 26 lies. If the inside 26 is not flat or straight, an approximate level is assumed as the level of the inside 26.

As the Figures 5 and 6 show, all the fingers 17, 18, 19, 20 of the rakes 15, 16 lie in a central plane 39 which contains the movement axis 51. The locking elements 34 and 35 lie on opposite sides of the central plane 39. The locking elements 34 and 35 overlap when viewed in the viewing direction 50. The blocking elements 34, 35 close the first intermediate space 29 from the second intermediate space 30, so that branches or the like are largely avoided from the second intermediate space 30 into the first intermediate space 29. How Fig. 6 shows, the locking elements 34 and 35 are axially symmetrical to the movement axis 51. In the in the Figures 5 and 6 shown view, the locking elements 34 and 35 are formed point-symmetrically to the movement axis 51.

Fig. 7 shows the rakes 15 and 16 in the position 28 pivoted away from one another. In this position, the drive element 43 is arranged farthest from the transmission housing 11. The inner sides 26 of the inner fingers 17 and 18 enclose an angle β which is significantly greater than 0 °. In the exemplary embodiment, the angle β is 20 ° to 40 °, in particular approximately 30 °. How Fig. 7 shows, the blocking elements 34 and 35 in the viewing direction 50 completely separate the first gap 29 from the second gap 30 in the position 28 of the rakes 15 and 16 pivoted away from one another. In the exemplary embodiment, the blocking elements 34 and 35 have a width b that is transverse to Longitudinal direction 36 of the associated finger 17, 18 is measured and is at least 10 mm. The width b is advantageously from 10 mm to 30 mm, in particular at least 20 mm. The width b of the locking elements 34 and 35 decreases in the direction of the free ends 32. The reduction in the width b is advantageously continuous. In particular, there is an arcuate course of the top. In the exemplary embodiment, a concave course of the upper side 37 of the locking elements 34 and 35 facing the free ends 32 is provided. The locking elements 34 and 35 are designed as a nose and have, as well Fig. 6 shows, each a rounded tip 52 to which the top 37 connects. On the side facing away from the upper side 37, the blocking elements 34, 35 run perpendicular to the inside 26 of the fingers 17, 18. The blocking elements 34, 35 have no area running parallel to the inside 26, so that branches or the like. cannot be pinched at the locking elements 34, 35. The width b of the blocking elements 34, 35 is advantageously at least half the height h. The width b is in particular at least as large as the height h. In the exemplary embodiment, the width b is greater than the height h.

How Fig. 8 shows, the blocking elements 34 and 35 overlap in the pivoted away position 28 of the rakes 15 and 16 in the viewing direction 50 with an overlap c which is greater than 0, in particular greater than 0.5 mm. In the exemplary embodiment, the overlap c is more than 1 mm, in particular more than 2 mm. However, it can also be provided that there is a small gap between the blocking elements 34 and 35 in the viewing direction 50 in the position 28 of the rakes 15 and 16 pivoted away from one another. However, the width of the gap is at most 5 mm. As a result, at most very thin branches can get from the second space 30 into the first space 29.

The actual distance e between the blocking elements 34 and 35, that is to say the distance between the blocking elements 34 and 35 regardless of the viewing direction, is advantageously less than 20 mm, in particular less than 10 mm. As a result, even inclined branches can only reach the first intermediate space 29 to a thickness that corresponds to the distance e, that is to say a thickness of less than 20 mm, in particular less than 10 mm. The smallest distance e is advantageously in a viewing direction parallel to the movement axis 51, which is the view in FIG Fig. 8 corresponds.

In Fig. 8 the holding section 38 of the left rake 15 is also shown. The holding section 38 has a width f, which is measured perpendicular to the central plane 39. The distance e is advantageously less than twice the width f, in particular less than 1.5 times the width f of the holding section 38. The distance e is preferably less than the width f, in particular less than 0.75 times the width f. The locking elements 34, 35 have at their rounded tips 52 a distance g to the central plane 39 measured perpendicular to the central plane 39. The distance g is advantageously less than twice, in particular less than 1.5 times the width f of the holding section 38. The distance g is preferably less than the width f, in particular less than 0.75 times the width f. The distance g can also be approximately 0, so that the two locking elements 34, 35 are immediately adjacent to one another in the pivoted position of the rakes 15, 16.

Fig. 9 shows the harvesting device 1 with a second set of rakes 45 and 46. The structure of the rakes 45 and 46 essentially corresponds to that of the rakes 15 and 16. However, the rakes 45 and 46 each have eight further fingers in addition to the one internal finger 17, 18 Finger 19, 20. Like Fig. 10 shows, the holding sections 58 of the rakes 45 and 46 protrude on the side facing away from the other rake 45, 46 beyond the rake carrier 40. Due to the larger holding sections 58 and the larger number of fingers 19, 20, the rakes 45 and 46 have a significantly greater weight than the rakes 15 and 16. The rakes 45 and 46 have a locking device 53 which is shown in FIG Fig. 11 is shown. The locking device 53 has a first locking element 54 on the left rake 45 and a second locking element 55 on the right rake 46. The locking elements 54 and 55 are arranged corresponding to the locking elements 34 and 35, but mirror-symmetrically to the central plane 39 of the rakes 45 relative to the locking elements 34 and 35 and 46. The locking devices 33 and 53 are thus mirror-symmetrical to one another with respect to the central plane 39.

Fig. 12 shows the harvesting device 1 with a left rake 15 of a first set of rakes and the right rake 46 of the second set of rakes. Because of the mirror-symmetrical design of the locking devices 33 and 53, the locking elements 34 and 55 form a blocking device 56 Fig. 13 shows, the locking elements 34 and 55 lie approximately in one plane and touch each other in the pivoted position 28 of the rakes 15 and 46 with their rounded tips 52. As a result, pivoting of the rakes 15 and 46 into the pivoted position towards one another is not possible . This is prevented by the locking elements 34 and 55, which form the blocking device 56. Provision can also be made for the blocking elements 34 and 55 to be designed such that the rakes 15 and 46 cannot already be mounted on a harvesting device 1. It However, it can also be provided that the locking elements 34 and 55 are designed in such a way that they are blocked only shortly before reaching the position pivoted toward one another.

Fig. 14 shows a further embodiment of a set of rakes for the harvesting device 1, which comprises a left rake 65 and a right rake 66. The rakes 65 and 66 have a locking device 73 which is formed by a first locking element 74 on the left rake 65 and a second locking element 75 on the right rake 66. The locking elements 74 and 75 are also in Fig. 15 shown. The locking device 73 is designed corresponding to the locking device 33. The rakes 65 and 66 each have an internal finger 17 and five external fingers 19, 20. The weight of the rakes 65 and 66 thus corresponds approximately to the weight of the rakes 15 and 16. Operation of the harvesting device with a left rake 15 and a right rake 66 or with a left rake 65 and a right rake 16 is not provided, however, does not lead to damage to the harvesting device 1. Because of the identical design of the locking devices 33 and 73, the harvesting device 1 can be operated with a rake 15 and a rake 66 or possible with a rake 65 and a rake 16.

How Fig. 15 shows, the fingers 17, 18, 19, 20 are offset from the central plane 39. The fingers extend from the common holding section 38 to opposite sides of the central plane 39. The free ends of the fingers 17, 18, 19, 20 thus lie in two mutually offset planes 71 and 72. The rakes 65, 66 have fingers 19a and 20a , the free ends 32 of which lie in the plane 71, and fingers 19b and 20b, the free ends 32 of which are in the plane 72 and which are arranged on the other side of the central plane 39. How Fig. 15 shows, fingers 19a and fingers 19b or fingers 20a and 20b are arranged alternately. The internal fingers 17 and 18 also run on opposite sides of the central plane 39. In the exemplary embodiment, the first locking element 74 is located on the left rake 65 on the side of the central plane 39 facing away from the internal finger 17. The internal finger 18 of the right rake 66 and the second one Locking element 75 lie on opposite sides of the central plane 39.

As well as Fig. 16 shows, the free ends 32 of the fingers 19a, 19b, 20a and 20b of the rakes 65, 66 are arranged at a distance d from the central plane 39. The fingers 18, 19a, 20a have a longitudinal direction 67, which connects the fastening ends 31 of the fingers 18, 19a, 20a to the free ends 32 of these fingers 18, 19a, 20a, and which are inclined to the central plane 39 by an angle γ. Accordingly, the fingers 17, 19b, 20b have a longitudinal direction 68 which connects the fastening ends 31 of the fingers 17, 19b, 20b to the free ends 32 of these fingers 17, 19b, 20b, and which is also inclined to the central plane 39 by an angle γ lie. In the exemplary embodiment, the angle γ is approximately 3 ° to 20 °, preferably 5 ° to 10 °. The angle γ can be the same for all fingers 17, 18, 19a, 19b, 20a, 20b of the rakes 65 and 66. However, different angles γ can also be provided for different fingers 17, 18, 19a, 19b, 20a, 20b.

In the sectional view in Fig. 17 the structure of the finger 17 is visible in detail. The other fingers of the rakes 65, 66 are designed accordingly. The finger 17 has a comparatively thin central rib 70, at the ends of which lateral ribs 69 arranged transversely to the central rib 70 extend. This results in a high stability with a low weight of the fingers 17, 18, 19a, 19b, 20a, 20b. Fig. 17 also shows the arrangement of the holding section 38 in the computing support 40 in detail. How Fig. 17 shows, the guide strips 48 in the guide grooves 47 positively fix the rakes 65, 66 in the rake carrier 40 in the direction of the free ends 32 of the fingers. The in Fig. 17 The structure shown for finger 17 can be advantageous for all fingers 17, 18, 19, 20 of all rakes 15, 16, 45, 46, 65, 66.

How Fig. 17 shows, the locking element 75 protrudes into a recess 49 on the rake 65. The locking element 75 extends into the area of the inner finger 17 of the left rake 65. Accordingly, the locking element 74 projects into a recess, not shown, on the rake 66 Locking elements arranged on the other rake are also advantageously provided in the rakes 15, 16, 45, 46. The cutouts 49 each form counter-contours for the locking elements 74, 75, into which the locking elements 74, 75 fit in the inner end position of the rakes 65, 66.

In the exemplary embodiments, the rakes 15, 16, 45, 46, 65, 66 are formed separately from the rake carriers 40 and the locking elements 34, 35, 54, 55, 74, 75 are on the rake 15, 16, 45, 46, 65, 66 arranged and formed in one piece with the rakes 15, 16, 45, 46, 65, 66. Locking elements 34, 35, 54, 55, 74, 75 and rakes 15, 16, 45, 46, 65, 66 consist of the same material, preferably of glass fiber reinforced plastic. However, it can also be provided that at least one locking element 34, 35, 54, 55, 74, 75 is formed in one piece with a computing support 40. The locking element 34, 35, 54, 55, 74, 75 advantageously consists of the material of the rack 40, preferably of metal. Provision can also be made for the rakes 15, 16, 45, 46, 65, 66 to be formed in one piece with the associated rake carriers 40 and the component of rakes 15, 16, 45, 46, 65, 66 and rake carrier 40 directly on the arms 14 to store the harvesting device 1 and to connect it with the pivoting levers 21. In this case, the blocking element 34, 35, 54, 55, 74, 75 is advantageously arranged in one piece on the common component, in particular integrally formed on the one-piece component. The one-piece component consisting of rakes 15, 16, 45, 46, 65, 66, rake carrier 40 and locking element 34, 35, 54, 55, 74, 75 is preferably made of plastic.

Claims (16)

1. Harvesting device with two pivotably mounted rakes (15, 16; 45, 46; 65, 66) pivotable between a position (27) in which they are pivoted towards each other and a position (28) in which they are pivoted away from each other, wherein each rake (15, 16; 45, 46; 65, 66) comprises a plurality of fingers (17, 18, 19, 20), which are arranged next to one another in a direction of view (50) parallel to a pivot axis (41) of a rake (15, 16; 45, 46; 65, 66), and with a drive unit comprising at least one drive element (43) pivoting the rakes (15, 16; 45, 46; 65, 66) to and fro about their pivot axis (41) in opposite directions in operation, wherein each rake (15, 16; 45, 46; 65, 66) is held by a rake support (40), wherein each rake (15, 16; 45, 46; 65, 66) has an inner finger (17, 18) facing the other rake (15, 16; 45, 46; 65, 66), wherein a first gap (29) and a second gap (30) are formed in the direction of view (50) parallel to a pivot axis (41) of a rake (15, 16; 45, 46; 65, 66) in the position (27) in which the rakes (15, 16; 45, 46; 65, 66) are pivoted towards each other, wherein the first gap (29) is at least partially bounded by the rake support (40) and the drive element (43) and wherein the second gap (30) is at least partially bounded by the inner finger (17) of the first rake (15, 45, 65) and by the inner finger (18) of the second rake (16, 46, 66),
   characterised in that the harvesting device (1) has a locking device (33; 53; 73), which comprises at least one locking element (34, 35; 54, 55; 74, 75), which is moved with a rake (15, 16; 45, 46; 65, 66) and extends in the direction of view (50) parallel to a pivot axis (41) of a rake (15, 16; 45, 46; 65, 66) between the first gap (29) and the second gap (30), and in that the locking device (33; 53; 73) separates the first gap (29) and the second gap (30) in each position of the rakes (15, 16; 45, 46; 65, 66) in such a way that the gaps (29, 30) are in the direction of view (50) parallel to a pivot axis (41) of a rake (15, 16; 45, 46; 65, 66) at most connected by way of a gap of no more than 5 mm.
2. Harvesting device according to claim 1,
   characterised in that the locking device (33; 53; 73) separates the first gap (29) and the second gap (30) in each position of the rakes (15, 16; 45, 46; 65, 66) completely from each other in the direction of view (50) parallel to a pivot axis (41) of a rake (15, 16; 45, 46; 65, 66).
3. Harvesting device according to claim 1 or 2,
   characterised in that the second gap (30) has a width (a), wherein the width (a) of the gap (30) does not decrease from the locking element (34, 35; 54, 55; 74, 75) to the free ends (32) of the inner fingers (17, 18) of the rakes (15, 16; 45, 46; 65, 66).
4. Harvesting device according to any of claims 1 to 3,
   characterised in that the insides (26) of the inner fingers (17, 18) of the rakes (15, 16; 45, 46; 65, 66) enclose in the direction of view (50) parallel to a pivot axis (41) of a rake (15, 16; 45, 46; 65, 66) in the position (27) in which the rakes (15, 16; 45, 46; 65, 66) are pivoted towards each other an angle (α), which is greater than 0° and opens in the direction towards the free ends (32) of the inner fingers (17, 18).
5. Harvesting device according to any of claims 1 to 4,
   characterised in that the locking element (34, 35; 54, 55; 74, 75) is designed as a lug.
6. Harvesting device according to any of claims 1 to 5,
   characterised in that the width (b) of the locking element (34, 35; 54, 55; 74, 75), which is measured transversely to the longitudinal direction (36) of the associated inner finger (17, 18), decreases towards the free end (32) of the fingers (17, 18).
7. Harvesting device according to any of claims 1 to 6,
   characterised in that the locking element (34, 35; 54, 55; 74, 75) has a first, concave top side (37), which bounds the second gap (30).
8. Harvesting device according to any of claims 1 to 7,
   characterised in that the locking element (34, 35; 54, 55; 74, 75) is fixed to the rake (15, 16; 45, 46; 65, 66) at a fastening end (31) of the inner finger (17, 18) of the rake (15, 16; 45, 46; 65, 66).
9. Harvesting device according to any of claims 1 to 8,
   characterised in that the locking element (34, 35; 54, 55; 74, 75) overlaps, in the position (27) in which the rakes (15, 16; 45, 46; 65, 66) are pivoted towards each other in the direction of view (50) parallel to a pivot axis (41) of a rake (15, 16; 45, 46; 65, 66), the other rake (15, 16; 45, 46; 65, 66).
10. Harvesting device according to any of claims 1 to 9,
    characterised in that each rake (15, 16; 45, 46; 65, 66) has a locking element (34, 35; 54, 55; 74, 75), and in that the two locking elements (34, 35; 54, 55; 74, 75) form the locking device (33; 53; 73).
11. Harvesting device according to claim 10,
    characterised in that the two rakes (15, 16; 45, 46; 65, 66) are designed to be axisymmetric to the movement axis (51) of the drive element (43).
12. Harvesting device according to any of claims 1 to 11,
    characterised in that the harvesting device (1) has a first set of rakes (15, 16; 65, 66) with a left-hand rake (15; 65) and a right-hand rake (16; 66) and a second set of rakes (45, 46) with a left-hand rake (45) and a right-hand rake (46), wherein the locking devices (33; 53; 73) are designed such that the right-hand rake (16; 66) of the first set of rakes (15, 16; 65, 66) and the left-hand rake (45) of the second set of rakes (45, 46) as well as the left-hand rake (15; 65) of the first set of rakes (15, 16; 65, 66) and the right-hand rake (46) of the second set of rakes (45, 46) in each case block one another in the position (27) in which they are pivoted towards each other.
13. Harvesting device according to claim 12,
    characterised in that the locking device (33; 73) of the first set of rakes (15, 16; 65, 66) is arranged mirror-symmetrically to the locking device (53) of the second set of rakes (45, 46) with respect to a central plane (39) of a rake (15, 16; 45, 46; 65, 66).
14. Harvesting device according to any of claims 1 to 13,
    characterised in that the rake (15, 16; 45, 46; 65, 66) has a holding section (38), at which all fingers (17, 18, 19, 20) of the rake (15, 16; 45, 46; 65, 66) are held and with which the rake (15, 16; 45, 46; 65, 66) is fixed to the rake support (40).
15. Harvesting device according to any of claims 1 to 14,
    characterised in that the harvesting device (1) has a guide tube (10), at one end (50) of which the rakes (15) are arranged, and in that the movement of the drive element (43) is transmitted to the rake (15) by way of at least one toggle lever (21), wherein the toggle lever (21) is held at a first fastening point (22) at the drive element (43) and at a second fastening point (23) at the rake support (40), and wherein the toggle lever bounds the first gap (29).
16. Rake for a harvesting device, wherein the rake (15, 16; 45, 46; 65, 66) has an inner finger (17, 18), which faces a further rake (15, 16; 45, 46; 65, 66) in operation, and wherein the rake (15, 16; 45, 46; 65, 66) has a central plane (39), in which lies a holding section (38, 58) of the rake (15, 16; 45, 46; 65, 66) for fixing the rake (15, 16; 45, 46; 65, 66) to a harvesting device (1),
    characterised in that the rake (15, 16; 45, 46; 65, 66) has a locking element (34, 35; 54, 55; 74, 75), which extends from one side of its inner finger (17, 18), wherein the locking element (34, 35; 54, 55; 74, 75) has a width (b), which is measured transversely to an inside (26) of the inner finger (17, 18) in a direction of view (50) perpendicular to the central plane (39) and is at least 10 mm.

Images